Man sought over Sydney indecent assaults

Police have released an image of a wanted man who jumped into a young woman's car in Sydney's west then indecently exposed himself and performed a lewd act.

They believe he may have committed an earlier indecent assault in the area in February 2013.

At about 1.30am on March 15 a man got into a blue Mazda stopped at traffic lights on the Great Western Highway in Parramatta and demanded the 22-year-old female driver keep driving.

Police say he then indecently exposed himself and performed a lewd act before running away.

Police have linked the incident to an indecent assault on February 17, 2013 in Green Valley.

At about 8.45am that day a 20-year-old woman and her friend were walking along Green Valley Road when a man approached and indecently assaulted her before walking away.

The man depicted in the police image has been described as having a tanned complexion, being about 25-30 years of age, around 180cm tall, with short black hair, an oval-shaped face and of a medium build.

Police are urging anyone who knows the man or has any information to come forward.